In conducting the hypothesis test below, your sample consists of 20 observations, with a mean of 47.8 and standard deviation of 2.55. H0:47.9H0:47.9 H1:<47.9H1:<47.9 a) This is a Select an answer two-tailed test. right-tailed test. no-way test. left-tailed test. none of the above b) Calculate the test statistic, rounded to 3 decimal places. t=t= c) At =0.05=0.05, the rejection region is

• t<-2.093ort>2.093t<-2.093ort>2.093
• t<-1.729t<-1.729
• t>1.729t>1.729
• none of the above

d) The decision is to

• fail to reject H0H0 since the test statistic does not fall in the rejection region.
• reject H1H1 since the test statistic falls in the rejection region.
• fail to reject H1H1 since the test statistic does not fall in the rejection region.
• reject H0H0 since the test statistic falls in the rejection region.
• none of the above